Tone-regulating device



May 8, 1923.

WITNESS:

1,454,727 R. E. CRISSEY TONE REGULATING DEVI CE Filed July 15 1921 ATTORNEYv Patented May 8, 1923.

' UNITED STATES RAYMCND E. CRISSEY, OF SYRACUSE, NEW YQBK.

TONE-REGULATING DEVICE.

Application filed July 15, 1921.

T 0 all whom it may concern:

' Be it known that I, RAYMOND E. Crussnv, a citizen of the United States, residing at Syracuse, in the county of Onondaga and State of New York, have invented new and useful Improvements in Tonedlegulating Devices, of which the following is a specification.

This invention relates to a tone regulating device for pianos, and the present object is to produce a device whereby the striking portion of the felts on the hammers of a pianoforte action may be punctured by a number of needles for the purpose of softening the felt at the striking point so as to regulate the action of the felts in striking the wires.

Another object is to produce a device of this nature which shall be simple of construction, cheap to manufacture and highly eflicient for the purpose for which it is devised.

With these and other objects in view which will be more apparent as the specification proceeds, the invention resides in certain novel construction and combination and arrangement of parts, the essential features of which are hereinafter fully described, and particularly pointed out in the appended claims and are illustrated in the accompanying drawing, in which Figure l is an edge View of my improved device.

Figure 2 is a side view mostly in section of the same.

Like characters of reference refer to like parts in both views.

Referring to the drawing in detail, 10 represents what may be termed a stationary framework and includes a handle portion 11 and two upwardly projecting side portions 12 connected at their upper ends by a cross member 13 and forming between them a way of sufiicient width to permit easy insertion of a hammer of a piano action. The members 12 are provided near their upper ends with slots 14 through which pass pins or screws 15 secured at their inner ends to a block 16 in which are secured in any desired manner a plurality of needles 17 having their ends projecting downwardly into the way formed at the members 12. The outer ends of pins or screws 15 are secured in the upper portions of links 18 which links are pivotally connected at their lower ends as at 19 to respective levers 20, pivoted at 21 to the Serial No. 484:,971.

member 10 and having their free ends secured together and formed into a handle 22. The pivot pin 19 pu s-es through a slot 2. 3 in member 11 and limits upward movement of the handle This upward movement of the handle is caused 1);. l 21: secured. to the handle ll. and pre i ng frictionally against the inner surface o? the handle ll. member is slidably secured to the member 10 b means of a screw at 26 which passes through a slot 27 in said member Q The member is bent laterally so to form a floor or seat 28 in the wa between. members 12 and is bent up at its free end so as to form a stop 29 for preventing movement of the pianoforte action hammer 30 from the aperture or way and also forming a guide for properly locking the hammer 30 with relation to the needies 17.

In operation, member 25 is adjusted to the desired position; the hammer 30 is then inserted in the way between the members 12 ainst the seat 28 and stop 29. The handles 11 and 22 are then closed toward each other which results in the pulling down of links 18 whereby the needles 1'? are caused to puncture the felt at the striking end of the hammer 30. b

While I have described what I deem to be the most desirable embodiment of my invention, it is obvious that many of the details may be varied without in any way departing from the spirit of my invention, and I therefore do not limit myself to the exact details of construction herein set forth nor to anything less than the whole of my in vention limited only by the appended claims.

hat is claimed is:

1. In a device of the class described, the combination of stationary member having a way formed therein for the reception of a hammer. a member adjustabl secured to said stationary member and eutemled into way a needle carrying member slidably secured in said way, and means tor moving said needle carrying member to ward and from said adjustable member.

2. In a device of the class described, the combination of a stationary member having a way formed therein for the reception of a hammer, a member adiustablv secured to the first said member and having a seat extended into said way and a stop formed at the end of said seat, a handle carrying member slidably mounted in said way, and means for moving said handle carrying member toward and from said adjustably mounted member.

3. In a device of the class described, the combination of a stationary member formed with a handle at one end and a way at the other end and an intermediate slot, 1* ad instable member secured to smd statmnary member and provided witl a extending into said way, a needle carrying rieinl'ier slidabl'y mounted in said way, parallel links for movingsaid needle carrying mel'nber in said way, a movable handle pivotally secured to said stationary member, and a pivotpin secured to said movable handle and ex tendin; through said intermediate slot in said stationary member, as and for the purpose set forth.

4:. In a device of the class described, the

eoizibination of a stationary member formed with a handle at one end and terminating into spaced walls at the other end, the said walls defining; away, an adjustable seat secured to the stationary member and extending into said way and adapted to receive the hammer for the correct positioning of allixed my RAYMON D F. CRISSE Y. 

